Confident Language

adjective free from doubt; certain

adverb without doubt; certainly

• The evidence presented in the case is doubtless and irrefutable.
• I'm doubtless going to ace this exam with all the studying I've done.
• She's doubtless the coolest person in our group.
• His dedication to his craft is doubtless a key factor in his success.

adverb used to emphasize the speaker's firm belief that something is the case

• Surely, you must be aware of the consequences of your actions.
• Surely, you can't be serious about going through with that plan.
• Surely, you're not gonna let that get to you, are you?
• The storm surely will pass, just hold on a little longer.